How can God's promises of victory, preservation, and healing for believers be reconciled with the killing and afflictions that befell some prophets and righteous people (such as the People of the Ditch and the killing of Umar), with the Prophet's (peace be upon him) being afflicted by magic, and with some patients not being cured by the Qur'an?

The Almighty's saying: "Guard Allah, and Allah will guard you" is not limited to guarding the body, but also includes guarding one's religion and faith from doubts and desires. Allah's support for His servants is not limited to one form; it may be through the triumph of an argument or vengeance against enemies. The martyrdom of Omar ibn Al-Khattab, may Allah be pleased with him, does not contradict the noble Hadith "Whoever prays Fajr is under Allah's protection," because the intent of the Hadith is that whoever harms one who has prayed Fajr exposes himself to Allah's punishment, not that one who prays Fajr is safe from all harm. The Prophet's sorcery does not contradict the verse: "Indeed, he has no authority over those who believe," because sorcery is of various types, and not all of it involves the authority of devils. Even if it involves their authority, it does not mean that the bewitched person is not among Allah's righteous servants; rather, it is a form of temporary tribulation. The Quran is a healing and a mercy for believers, but it increases the wrongdoers only in loss, because the fault is from them, not from the Quran. The delay in healing despite reciting the Quran may be a trial from Allah, and not every delay means a lack of response. There may be good in it that only Allah knows, and a Muslim should not rush or despair from supplication.